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Finding the Fourth Proportional to 841.31, 1,261.95 and 225.06

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Solution

The fourth proportional to 841.31, 1,261.95 and 225.06 is: 337.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.31 : 1,261.95 = 225.06 : x
  2. Step 2: Convert to fraction form
    841.31/1,261.95 = 225.06/x
  3. Step 3: Cross multiply
    841.31x = 1,261.95 × 225.06
  4. Step 4: Simplify right side
    841.31x = 284,014.47
  5. Step 5: Solve for x
    x = 284,014.47/841.31
  6. Step 6: Final answer
    x = 337.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.